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1.
Just sand, but you can get trapped and suffocate in it.
"Oh no! Help! I'm trapped in quicksand! I'm about to drown!"
"Actually, quicksand is just sand, but it's just a bit runnier."
"Oh hey, I didn't know that. That's pretty cool. Gurgle"
by Skelwor September 07, 2009
 
2.
1)Quicksand- Sand surface that when stepped on, gives way which causes you to sink at a certain rate due to certain factors:
-Height/Weight
-Surface Area
-Movement

2)Quicksand(Situation)-Situation where no matter what you do, things only get worse. Even if you are trying your hardest to make things better.
Example 1:
Bill: Hey watch your step.
Bob:What...*steps in quicksand* Ahh! What is this?!
Bill: You just fell into some quicksand!
Bob: Bummer...*sinks*

Example 2:
Bill: Ah poop...
Bob: Hey what's the matter?
Bill: It's my wife, no matter what I do our marriage seems to break away.
Bob: Well there's only one solution.*Pulls out gun*
Bill: O_o*sigh*
by Tasty Poptarts December 10, 2009
 
3.
An instance after a sexual encounter, where rejection by one party only increases the attraction of the other party. Thereby, further enveloping the rejecting party into a cataclysmic pool of never-ending harassment.

i.e When a male encounters a clinger in which she believes she is entitled to post-dating/pre-girlfriend rights.
Joe: Hey Dave, did you get rid of Patty?
Dave: Nah man, the harder I try the more I get stuck in quicksand.
by tripod2011 September 06, 2011
 
4.
An act in which the man presses his dick into an unstimulated vagina (read: not wet) so that the dick slowly, inch by inch, descends into the increasingly lubricated abyss
Last night, I met this chick at a bar. She was not worth the foreplay (or the two dollar shots). Consequently, I quicksand-ed her, yelling obscenities while her sick ass got gradually turned on.
by quicksandingsoba September 04, 2010